Gas cut-off



l 1. Juy 19 1927 F. E. ERBE 635 986 GAS CUT-OFF Filed Jan-18, 1927 V inost'atv willfcontract and. release weight.

Patented July 19, 1927-.

` raam; EDWARD orA remi-me, meinem.

Gas cuceorr.

application `ineaJanuaryf1a, 192.7. sei-iairiva.wrt/'ear` `The 4,invention relatesftowgas cutons andr has for` its object to. provide ,a device-otl this character thern'iostatically controlled and'zca'rried by a gas supply pipe andforln ingineans whereby upon loss ot pressure or flow ot through the pipe the ther.-

`means connected. to a. va-lvef` and which weightrneans when released will close the valve and prevent iiow otgas through.theV

pipe to-any burnerswvhich may have been extinguislied 4 by. tlie loss ot flow, consequently dangerl 'of asphyxiation or explosion ,is5ob`viatedl A`v` ltirtlier Objectis to provide upwardly extending'brackets carried the supplyv pipe, and which brackets are connec't'edf to vopposite sidesy ofI an annularl thermostat, which is heated by aburner', a'nupwardly extendingltrip lever axially disposed in relation to the thermstat* and having; connec-tedI thereto l at spaced points arms,` which arms are inI turnil anchored to'lopposite sides of the thermostat whereby upon a contraetion of the thermostat1 incident to cooling, the trip lever will be tilted releasing-a* weiglit" controlled"lever for closing the valve. i v

l/Vith the above and other objects in view the invention resides in the combination and arrangement of parts as hereinafter set t'orth` shown in the drawing, described and claimed, it being understood that changes in the precise embodiment of the invention may be made within the scope of what is claimed without departing from the spirit of the invention.

In the drawing:

eFigure l is a side elevation of the device showing the same applied to a gas supply ipe. p Figure 2 is a top plan View of the device.

Figure 3 is a detail perspective view of the lower end of the trip lever and the arms connected thereto.

Referring to the drawing, the numeral 1 designates the supply pipe leading into a house from the street, 2 a meter and 3 the horizontal portion of the supply pipe, which horizonal portion of the supply pipe is provided with the usual cut ott valve 4, which is open at all times'. It has been found that where gas burners are in use throughout a house that danger of asphyxiation or explosion is caused incident to the 1 for allbwing passageofgasftlirou cutting, ottliesupplylowpres- Sure from, the outside of the house, for. 1n-

stance during repairing-jot.plains, the'4 lights are extinguished when the gas isupplyv iscut ofi', consequently w-henj the supply again ows-thegas isldiseharged intov the house from the burners. Disposed'gon'the portioln 3 of. the supplypipe*tesa-clamp,5,gto which isfpivotallyI connected atffnabellcralnk lever 7 thearms of which .divergefu hardly, and thefdivergingarin 8 isV` ,rovidediwithlalhori# zontal portion 9? to )ich is connected ati 10 afleiible. memberr 11,Ito the lower. end,

of whichisconnected'aV weight 121er'.rock?f lever when the.A flexible ing;A the` bell crank meinb'er'V 1l isf allowedto move. downwardly. Theiar'rn 13 ofthe bell crank lever; has a; link`connectionvy 121 to the arm 15 of aplug valve1'6', the port 17 of which; in the dottedline position showin in F igureV supply pipe tovarioiis brnerstlirouggl'duta house.L `Eirtending upwardly yfromitle por-v tion 3' ofthe supplypipe are; spa'ced brackets 18'fo`n` the Aurip'r"ends of which' are" disposed irrward'ly extending arrn's-v` (19,", Yand which ariis are also connected' by* Inerns' of :the rivets 20, to opposite sides of the annular thermostat 21, whereby during the expansion of the thermostat 21 said arms 19 will move outwardly and upon the cooling and contracting of the thermostat said arms will move inwardly. The thermostat 21 is heated by means of a burner 22 which gets its supply of gas from the pipe 3, and the amount of gas supplied is controlled by a conventional form of valve 23, and it will be seen when the flow of 'gas is cut off, the burner 22 will be extinguished, consequently the thermostat 21 will cool and contract. The inner ends of the arms 19 are pivotally connected at 24 to thevertically disposed trip lever 25, and at spaced points, therefore it will be seen upon contraction of the annular thermostat 21, the upper end of the lever 25 will be moved in the direction of the arrow a whereby the holding lug 26 will move out of overlying engagement with the end 27 of the rock lever 28, which is supported on a bracket 29, consequently the vflexible member 11 which is connected at 30 to the rock lever 28 will be allowed to move downwardly under the control of the weight 12, thereby rocking the bell crank lever 7, imparting a pull on the link 14: in the direction of the arrow Z) and moving is nonmally` ceY 0th the Y the plug valve to a closed position, consequently cutting off the flow of gas through the supply pipe until the plug valve 16 is manually moved to open position, the burner 22 lighted and the termostat again heated for holding the trip lever 25 in the position shown in Figure l. Brackets 18 are preferably carried by sleeves 31, and provided with elongated slots 32 through which screws 33 extend, and which screws and slots allow movement of the bracket towards and away from each other so as not to interfere with the expansion and contraction of the annular thermostat 21, and at the same time the screws prevent rotation of the sleeves on the pipe 3.

From the above it will be seen that a thermostatioally controlled automatid out off valve is provided for gas supply lines, which Will be moved to closed position upon the v stopping of the flow of gas through the supply pipe, is positive inits operation, and may be easily and quickly applied to a gas supply pipe without materially changing the construction. It will also be seen that the device is simple in construction, the parts reduced to a minimum and can be cheaply manufactured and Sold.

The invention having been set forth what is claimed as new and useful is 1. The combination with a gas supply pipe, a out off valve carried by said pipe, of a thermostat control for closing said valve, said thermostat control comprising an annular thermostat above the pipe, brackets carried by the pipe for supporting said thermostat, said brackets being movable towards and away from each other, arms extending inwardly from opposite sides of the thermostat, a vertically disposed trip lever, said last named arms being pivotally connected to the trip lever at spaced points, an upwardly extending bracket carried by one side of the thermostat, a rock lever carried by said last named bracket and having one of its ends disposed in a recess in the trip lever, a weight suspended from the other end of the rock lever, a bell crank lever carried by the pipe, said weight being also sus pended from one arm of the bell crank lever, an arm carried by the valve and a link connection between the other end of the bell crank lever and the arm carried by the valve.

2. The combination with a gas supply pipe having a cut off valve, of a thermostat ring adjacent said pipe, means for heating said I ring during the How of gas through the'pipe, a vertically disposed trip lever axially disposed in relation to the ring, arms pivoted to the trip lever at spaced points, said arms being anchored to opposite sides of the ring whereby upon contraction of said ring, the arms will be forced together for rocking the trip lever, said trip lever controlling weight controlled mechanism for closing the valve.

In testimony whereof I hereunto aix my signature.

' FRANK EDWARD ERBE. 

